167 lines
3.8 KiB
C++
167 lines
3.8 KiB
C++
/*
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* This file is a part of PikoTools
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2018-2021, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef headerfile_pikotools_src_convert_patternreplacer
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#define headerfile_pikotools_src_convert_patternreplacer
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#include <string>
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#include "textstream/textstream.h"
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#include "strtoint.h"
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namespace pt
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{
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template<typename CharType, typename StrType>
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class PatternReplacerBase
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{
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public:
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/*
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* output_string can be the same string as input pattern
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*/
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template<typename ... Types>
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void ReplaceToString(const StrType & pattern, StrType & output_string, Types ... types)
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{
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ReplaceGeneric(pattern, output_string, types...);
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}
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template<typename ... Types>
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StrType Replace(const StrType & pattern, Types ... types)
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{
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StrType output_string;
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ReplaceGeneric(pattern, output_string, types...);
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return output_string;
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}
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private:
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std::vector<StrType> params;
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TextStreamBase<CharType, 256, 4096> buffer;
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StrType temp_str;
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template<typename ... Types>
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void ReplaceGeneric(const StrType & pattern, StrType & output_string, Types ... types)
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{
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params.clear();
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AddParams(types...);
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ReplacePattern(pattern);
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buffer.to_str(output_string);
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params.clear();
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buffer.clear();
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temp_str.clear();
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}
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void AddParams()
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{
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}
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template<typename Type, typename ... Types>
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void AddParams(const Type & type, Types ... types)
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{
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buffer.clear();
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buffer << type;
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buffer.to_str(temp_str);
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params.push_back(temp_str);
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temp_str.clear();
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AddParams(types...);
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}
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void ReplacePattern(const StrType & pattern)
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{
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buffer.clear();
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for(size_t i=0 ; i<pattern.size() ; )
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{
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bool pattern_changed = false;
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if( pattern[i] == '%' )
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{
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if( i + 1 < pattern.size() )
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{
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if( pattern[i+1] == '%' )
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{
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buffer << '%';
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i += 2;
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pattern_changed = true;
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}
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else
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{
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const CharType * index_start_str = &pattern[i+1];
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const CharType * after_str;
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bool was_overflow;
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unsigned long index = Toul(index_start_str, 10, &after_str, &was_overflow, false);
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if( !was_overflow && after_str > index_start_str && (size_t)index < params.size() )
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{
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i = i + 1 + (after_str - index_start_str);
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buffer << params[index];
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pattern_changed = true;
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}
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}
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}
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}
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if( !pattern_changed )
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{
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buffer << pattern[i];
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i += 1;
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}
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}
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}
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};
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typedef PatternReplacerBase<char, std::string> PatternReplacer;
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typedef PatternReplacerBase<wchar_t, std::wstring> WPatternReplacer;
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}
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#endif
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